Genuine Conn French Horn parts, 6D, 8D, 9D, & others, including some Conn trombones.  Rotary valve parts.  Brand new from Conn-Selmer, not aftermarket.  Contact me with your model if unsure.  

See my item ID# 273180618134 for my rotary valve lever spring kit.  

See my item ID# 273180618132 for my rotary valve string, bumpers, & string screw kit.

See my item ID# 273179049060 if you just need string.